On 17 March your 0520 DR position is LAT 27°23.0'N, LONG 39°42.0'W. You observe an unidentified star bearing 313°T at an observed altitude (Ho) of 43°03.8'. The chronometer reads 08h 22m 15s and is 01m 45s fast. What star did you observe?

Question

On 17 March your 0520 DR position is LAT 27&deg;23.0'N, LONG 39&deg;42.0'W. You observe an unidentified star bearing 313&deg;T at an observed altitude (Ho) of 43&deg;03.8'. The chronometer reads 08h 22m 15s and is 01m 45s fast. What star did you observe?

Accepted Answer

Option D: Alkaid. Utilize the Nautical Almanac to find GHA Aries and SHA for the given time. Calculate the star's LHA and Declination. Comparing these values against the observed bearing of 313°T and altitude of 43°03.8' confirms the star is Alkaid, consistent with standard celestial navigation reduction procedures found in Bowditch.

On 17 March your 0520 DR position is LAT 27&deg;23.0'N, LONG 39&deg;42.0'W. You observe an unidentified star bearing 313&deg;T at an observed altitude (Ho) of 43&deg;03.8'. The chronometer reads 08h 22m 15s and is 01m 45s fast. What star did you observe?

On 17 March your 0520 DR position is LAT 27°23.0'N, LONG 39°42.0'W. You observe an unidentified star bearing 313°T at an observed altitude (Ho) of 43°03.8'. The chronometer reads 08h 22m 15s and is 01m 45s fast. What star did you observe?